Shoe midsole assembly equipped airbag system

ABSTRACT

Provided is an in-sole assembly for shoes. The in-sole assembly includes an in-sole, a shank board which is arranged on a lower part of the in-sole, an air bag cushion sole which is arranged on an upper part of the in-sole, wherein the air bag cushion sole includes a plurality of air bags in which air is filled and which are projected upwards, wherein the air bag includes a plurality of main air bags which are arranged from one side of an arched area of a foot to an area of a big toe so as to form a line, and a plurality of auxiliary air bags which are formed around the main air bags.

TECHNICAL FIELD

The present invention relates to an in-sole assembly for shoes including an air bag system, and more particularly, to an in-sole assembly for shoes including an air bag system which may efficiently absorb an impact and significantly reduce fatigue in feet by forming a main air bag on a line with the largest impact or load of the feet and forming an auxiliary air bag around the portion, and may improve air-permeability by forming an air hole and a ventilation layer made of mesh.

BACKGROUND ART

Generally, an in-sole assembly for shoes is composed of an in-sole, a shank, and a shank board. The shank, which maintains the shape of the shoes and prevents the shoes from being come off, is fixed on the lower surface of the in-sole, and the shank board, the out-sole and a heel are coupled with the bottom surface of the shank.

A filler made of cork, etc. may be added between the out-sole and the shank board.

A separate pad made of urethane may be arranged on the upper surface of the in-sole in order to absorb an impact applied to the feet. However, when a separate filler is arranged, the process is added and the shoes become thick, which may lower the aesthetic level. Further, when a separate pad is arranged, the space for the wearer's feet is reduced, which may be inconvenient to the wearer.

Further, a shoes heel is fixed by driving a nail on the upper part of the in-sole, and a heel pad may be added to the upper surface of the in-sole so that the upper part of the nail is projected, but the nail may be projected at the time of manufacturing or using the shoes, which may be inconvenient to the wearer.

Further, according to a report issued by American Podiatric Medical Association, ¾ of Americans are suffering from chronic feet problems, and more than 55 million times of medical examinations and treatments due to feet problems are performed each year. What is more surprising is the fact that most of these feet problems are because of the shoes. The shoes change the structure of the feet bones and become the cause of the pain in the knee and the waist. In the case of Korea, according to Health Insurance Corporation Policy Institute of South Korea, the yearly costs paid by the Health Insurance Corporation due to the postnatal shoe-related injury increased by 77% from 2005 to 2009. Particularly, unlike sports shoes, formal shoes have less cushion and thus as the wearing times increase, the wearer feels more fatigue.

Further, the formal shoes are made of natural or artificial leather, and thus the ventilation is poor.

PRIOR ART LITERATURE Patent Literature

-   (Patent Literature 0001) KR 10-0464461 “Method of manufacturing     shoes which absorb an impact and the shoes” (17 Jan. 2005)

DISCLOSURE Technical Problem

An object of the present invention is to provide an in-sole assembly for shoes including an air bag system which may efficiently absorb an impact and significantly reduce fatigue in feet by forming a main air bag on a line with the largest impact or load of the feet and forming an auxiliary air bag around the portion.

Another object of the present invention is to provide an in-sole assembly for shoes including an air bag system which may improve air-permeability by forming an air hole and a ventilation layer made of mesh.

Another object of the present invention is to provide an in-sole assembly for shoes including an air bag system which may improve stability by extending the shank from the horizontal central axis of the shoes in the front direction and configuring the shank to be divided into the right and left sides in Y shape.

Technical Solution

In order to solve the above problem, an in-sole assembly for shoes includes: an in-sole; a shank board which is arranged on a lower part of the in-sole; and an air bag cushion sole which is arranged on an upper part of the in-sole, wherein the air bag cushion sole includes a plurality of air bags in which air is filled and which are projected upwards, wherein the air bag includes: a plurality of main air bags which are arranged from one side of an arched area of a foot to an area of a big toe so as to form a line; and a plurality of auxiliary air bags which are formed around the main air bags.

Each of the main air bags may be formed in an over shape in which a longer axis is horizontally arranged, wherein each of the auxiliary air bags may include: a first auxiliary air bag which is formed in an oval shape in which a longer axis is vertically arranged; and a second auxiliary air bag which is smaller than the first auxiliary air bag and is externally arranged at an external side of the first auxiliary air bag.

The in-sole assembly may further include: a ventilation layer made of mesh materials, which is stacked on the upper part of the air bag cushion sole and in which an air bag inserting hole is formed so that the air bag may be inserted, wherein at least one air hole is formed at the in-sole, the air bag cushion sole, and the shank board so that heat or air may be discharged to the lower side of respective shoes.

The in-sole assembly may further include: a shank which is arranged between the in-sole and the shank board, wherein the shank includes a head part which is arranged at a heel area, a connection part which is extended from the head part to the horizontal center axis, and a leg part which is extended in the connection part in an Y shape, wherein a plurality of guide holes, which guide the positions of respective fixing members which fix the in-sole, the shank board, and the bottom sole, are formed in the head part.

A penetration hole may be formed in the in-sole, the air bag cushion sole, and the ventilation layer so that the head part may be exposed, and a cushion member including connection part, which is inserted into the penetration hole, and an extension part, which is extended from the coupling part, may be further included.

Advantageous Effects

According to an in-sole assembly for shoes including an air bag system of the present invention, an impact may be efficiently absorbed and fatigue in feet may be significantly reduced by forming a main air bag on a line with the largest impact or load of the feet and forming an auxiliary air bag around the portion.

According to an in-sole assembly for shoes including an air bag system of the present invention, air-permeability may be improved by forming an air hole and a ventilation layer made of mesh.

According to an in-sole assembly for shoes including an air bag system of the present invention, stability may be improved by extending the shank from the horizontal central axis of the shoes in the front direction and configuring the shank to be divided into the right and left sides in Y shape.

DESCRIPTION OF DRAWINGS

FIG. 1 is an exploded perspective view of an air bag cushion sole and a ventilation layer of the present invention.

FIG. 2 illustrates an in-sole assembly for shoes including an air bag system according to an embodiment of the present invention.

FIG. 3A is a cross-sectional view of a penetration hole of a coupling part of a cushion member and an air bag cushion sole.

FIG. 3B is a cross-sectional view of a structure which is different from the structure of FIG. 3A.

FIGS. 4 and 5 are cross-sectional views of an in-sole assembly for shoes including an air bag system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

When describing the present invention, if it appears that the specific description on the related known functions or configurations unnecessarily make the main idea of the present invention obscure, the detailed description thereof will be omitted. Further, the terms in the present specification have been defined in consideration of the functions of the present invention and may be different depending on the intension or the user or the operator, or precedents, etc. Hence, the definition needs to be made based on the contents throughout the present specification.

FIG. 1 is an exploded perspective view of an air bag cushion sole and a ventilation layer of the present invention. FIG. 2 illustrates an in-sole assembly for shoes including an air bag system according to an embodiment of the present invention. FIG. 3A is a cross-sectional view of a penetration hole of a coupling part of a cushion member and an air bag cushion sole, and FIG. 3B is a cross-sectional view of a structure which is different from the structure of FIG. 3A. FIGS. 4 and 5 are cross-sectional views of an in-sole assembly for shoes including an air bag system according to an embodiment of the present invention.

Referring to FIGS. 1 to 5, an in-sole assembly for shoes including an air bag system according to the present invention includes an in-sole 10, a shank board 60 which is arranged on the lower part of the in-sole 10, an air bag cushion sole 20 which is arranged on the upper part of the sole 10, a ventilation layer 30 which is arranged on the upper part of the air bag cushion sole 20, a shank 50 which is arranged between the in-sole 10 and the shank board 60.

The sole may be made of several materials.

The air bag cushion sole 20 absorb or disperse an impact at the time of walking and may be made of synthetic resins. Further, a plurality of air bags, in which the air is filled and which are projected to the upper side, are formed in the air bag cushion sole 20.

The air bag has the air in the inside so as to provide a cushion and disperse the impact and is divided into a main air bag 21 and auxiliary air bags 23 and 25. Further, respective air bags 21, 23, and 25 may preferably be connected to each other as illustrated in FIG. 3A. Though not illustrated, respective air bags may not be connected to each other.

The main air bag 21 forms a line as a plurality of air bags 21 are arranged from one side of the arched part of a foot to the big toe area.

The main air bags 21, which are formed at one side of the arched area of the foot, are arranged on the vertical center axis, and are arranged in the big toe area while getting out of the vertical center axis.

Likewise, the main air bag 21 forms a line on the basis of an area where there is a heavy load at the time of walking, and thus the impact may be efficiently absorbed. Further, the main air bag 21 may be formed as a round shape or an oval shape. Preferably, the main air bag 21 may be formed in an oval shape in which the longer axis is vertically arranged so that the load may be easily distributed to the right and the left.

The auxiliary air bags 23 and 25 are arranged on the right and left sides of the main air bag 21 so as to provide a cushion and disperse the load. The first auxiliary air bag is formed in an oval shape and the second auxiliary air bag 25 is arranged on the external side of the first auxiliary air bag 23.

The height and the size of the first auxiliary air bag 23 may preferably correspond to the height and the size of the main air bag 21.

The second auxiliary air bag 25 is mainly arranged on the edge area and is formed smaller than the first auxiliary air bag 23. If the second auxiliary air bag is omitted, a high step is formed between the first auxiliary air bag, which is formed relatively high, and a floor surface of the air bag cushion sole, and thus the comfortable feeling is lowered. Hence, the second auxiliary air bag may be preferably formed lower than the first air bag so as to reduce a step between the first auxiliary air bag and the floor surface.

Further, the arched part 27 of the air bag cushion sole 20 is formed higher than the main air bag 21 or the first auxiliary air bag 23 so as to support the arched area of the concave foot. Here, the arched part 27 may be formed as an air bag type in which the air is filled as in the main air bag 21 or may be formed of synthetic resins.

The ventilation layer 30 according to the present invention is stacked on the upper part of the air bag cushion sole 20. An air bag inserting hole 31 is formed in the ventilation layer 30 and the ventilation layer may be formed of at least one sheet. Further, the air bag inserting hole 31 may be formed so that the plurality of air bags may be inserted.

Further, the ventilation layer 30 is made of mesh, and thus a space in which the air or heat may move, and the air or the heat which circulates the ventilation layer is discharged to the lower side of the shoes through the air hole H1.

Specifically, the air hole H1 is formed on the bottom sole as well as the in-sole, the air bag cushion sole 20, and the shank board 60. Respective air holes are formed on the heel area so as to be vertically connected to each other. A pair air holes are preferably formed at both sides of the connection part of the shank so that the air or the heat may be circulated.

Further, a shank 50 may be arranged between the in-sole 10 and the shank board 60.

The shank is used to strengthen the in-sole and is generally made of metal, but the embodiment is not limited thereto. The shank may be made of various materials such as plastic.

The shank 50 may include a head part 51 which is arrange don the heel area, a connection part 53 which is extended from the head part 51 to the horizontal center part, and a leg part 55 which is extended from the connection part 53 in an Y shape. Further, the shank 50 is firmly coupled with the in-sole 10 and the shank board 60 through the rivet F2.

At least one guide hole 52, which guides the position into which the in-sole 10, the shank board 60, the bottom sole, and at least one fixing member (e.g., a nail or a screw) F1 for fixing the heel, may be formed on the head part 51.

For example, the head part 51 is formed in a hexagonal shape and 3 guide holes 52 may be formed.

The connection part 53 is formed in a rectangular shape, and a long hole 54 is formed for an elastic structure. Further, the connection part 53 is formed in the structure of a straight line, curved line, or a combination thereof in order to correspond to the curve of the shoes.

The leg part 55 may preferably be formed in an Y shape which is divided into two branches on the basis of horizontal central axis. This is because stability or comfortable feeling may be improved at the time of walking by supporting the right and left sides of the front area of the horizontal central axis in the leg part 55.

Further, referring to FIG. 3A, a penetration hole H2 is formed in the in-sole 10, the air bag cushion sole 20, and the ventilation layer 30 so that the heat part 51 may be exposed, and a cushion member 40 is coupled with the penetration hole H2.

The cushion member 40 disperses the load or impact of the heel area and may be made of synthetic resins such as urethane or ethylene vinyl acetate (EVA).

Further, the cushion member 40 may be formed of a coupling part 41 which is inserted into the penetration hole H2 and an extension part 43 which is extended from the coupling part 41.

The coupling part 41 is projected to the lower side from the extension part and is formed in the size and shape corresponding to the penetration hole H2 so as to be inserted into the penetration hole H2.

The extension part 43 may be configured to be extended from the heel to the area around the horizontal central axis.

Further, the coupling part 41 of the penetration hole H2 and the cushion member 40 are configured in an oval shape or a polygonal shape so as not to be rotated within the penetration hole H2 when the cushion member 40 is inserted.

Referring to FIG. 3B, unlike the above-described embodiment, the coupling part is formed on the overall part of the lower surface of the extension part in order to be formed from the heel area to the area around the horizontal central axis.

As in the embodiment, when the coupling part is formed only on the heel, the extension part may be formed thinner than the coupling part so that the sense of cushion may become imbalanced. Hence, the coupling part may be preferably formed on the overall part of the lower surface of the extension part. At this time, the extension part may be formed larger than the coupling part, and the coupling part may be formed to correspond to the penetration hole, and thus only the extension part is exposed.

The embodiments described above are used to illustrate the present invention, but the present invention is not limited to the embodiments and it is obvious that the embodiments can be changed to other embodiments within the scope of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

-   10: in-sole -   20: air bag cushion sole -   21: main air bag -   23: first auxiliary air bag -   25: second auxiliary air bag -   27: arched part -   30: ventilation layer -   31: air bag inserting hole -   40: cushion member -   41: coupling part -   43: extension part -   50: shank -   51: head part -   52: guide hole -   53: connection part -   54: long hole -   55: leg part -   60: shank board -   H1: air hole -   H2: penetration hole -   F1: fixing member -   F2: rivet 

1. An in-sole assembly for shoes, the in-sole assembly comprising: an in-sole; a shank board which is arranged on a lower part of the in-sole; and an air bag cushion sole which is arranged on an upper part of the in-sole, wherein the air bag cushion sole includes a plurality of air bags in which air is filled and which are projected upwards, wherein the air bag comprises: a plurality of main air bags which are arranged from one side of an arched area of a foot to an area of a big toe so as to form a line; and a plurality of auxiliary air bags which are formed around the main air bags.
 2. The in-sole assembly of claim 1, wherein each of the main air bags is formed in an over shape in which a longer axis is horizontally arranged, wherein each of the auxiliary air bags comprises: a first auxiliary air bag which is formed in an oval shape in which a longer axis is vertically arranged; and a second auxiliary air bag which is smaller than the first auxiliary air bag and is externally arranged at an external side of the first auxiliary air bag.
 3. The in-sole assembly of claim 2, further comprising: a ventilation layer made of mesh materials, which is stacked on the upper part of the air bag cushion sole and in which an air bag inserting hole is formed so that the air bag may be inserted, wherein at least one air hole is formed at the in-sole, the air bag cushion sole, and the shank board so that heat or air may be discharged to the lower side of respective shoes.
 4. The in-sole assembly of claim 3, further comprising: a shank which is arranged between the in-sole and the shank board, wherein the shank includes a head part which is arranged at a heel area, a connection part which is extended from the head part to the horizontal center axis, and a leg part which is extended in the connection part in an Y shape, wherein a plurality of guide holes, which guide the positions of respective fixing members which fix the in-sole, the shank board, and the bottom sole, are formed in the head part.
 5. The in-sole assembly of claim 4, wherein a penetration hole is formed in the in-sole, the air bag cushion sole, and the ventilation layer so that the head part may be exposed, wherein a cushion member including connection part, which is inserted into the penetration hole, and an extension part, which is extended from the coupling part, is further included. 